How To Get Cpu Info and Number of Cpus In Linux?

Cpu is central part of the computer systems. They provide all logic and computation power to the operating system that runs on them. In general we look the frequency and brand of the cpu like i5,i7. There are very different features in detail in CPU’s. There are different commands to get cpus information like flags, instrcutionset, product name etc. But most compatible cpu information source is /proc/cpuinfo